JPS5947818B2 - automatic pot - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic pot, which automatically stops supplying water (hot water) to a bathtub.

To explain this using an example of a circulating hot water supply bath pot, 1 is a can body consisting of a bath heat exchanger 2 and a hot water supply heat exchanger 3, and a common gas burner 4 is provided below it.

5 is a gas passage leading to the gas burner 4, and a safety valve 6 and a main valve 7 are arranged from upstream.

8 is a pilot burner, and 9 is a pilot valve.

10 is a thermocouple facing the pilot burner 8, and forms a thermoelectric circuit with an electromagnet 11 that opens and closes the safety valve 6.

12 is a main shaft for opening and closing the safety valve 6, main valve 7, and pilot valve 9.

The operating stroke of the main shaft 12 consists of a pilot ignition stroke consisting of an initial 90° rotation operation, followed by a main ignition stroke, and the main ignition stroke consists of a hot water supply stroke consisting of a 90° rotation operation, followed by a pilot ignition stroke. It is divided into a bathing process in which it is pressed once and then rotated by 90 degrees, and a restraining process in which it is pressed once after the hot water supply process.

Reference numeral 13 denotes a water passage consisting of an inlet passage 14 and an outlet passage 15 communicating with the hot water supply heat exchanger 3, and the outlet passage 15 is provided with a water stop valve 16.

Reference numeral 17 denotes a portion of a venturi formed downstream of this water stop valve 16, and this venturi portion 17 communicates with a differential pressure device to be described later.

Reference numeral 18 denotes a lever that opens and closes the water stop valve 16, and is rotatable around a shaft 19.

20 is a cam fixed to the main shaft 12, and this cam 20 presses the lever 18 to release the spring 5 through the spindle 50.
1, the water stop valve 16 is opened.

Reference numeral 21 denotes a lock arm in which the lever 18 holds the water stop valve 16 in an open state, and the lock arm 21 is connected to the shaft 5.
2, it can be moved up and down, and is normally moved by the roller 2 at the tip.
2 is still in contact with the cam 20 from above, and when the main shaft 12 is pressed while the cam 20 is pressing the lever 18, the fifth
As shown by the broken line in the figure, the lock arm 21 descends together with the cam 20, and a roller 22 provided at the tip of the lock arm 21 engages with the lever 18.

The lever 18, the lock arm 21, etc. constitute a restraint device 43.

Reference numeral 23 denotes a differential pressure device that is activated to release the engagement between the lever 18 and the lock arm 21 when the water level in the bathtub 24 reaches a set water level.

This differential pressure device 23 is divided into a chamber 26 and a chamber 27 by a diaphragm 25, and the chamber 26 communicates with the venturi portion 17 through a pipe 28.

The chamber 27 is open to the atmosphere through a hole 29.

30 is a spring that always urges the diaphragm 25 toward the chamber 27 side.

Reference numeral 31 denotes a rod linked to the diaphragm 25. This rod 31 has its upper end facing the lock arm 21 from below, and when the set water level is reached, it rises in response to the diaphragm 25 and presses the lock arm 21, thereby closing the lock arm. 21 to rise.

32 is a water level sensing pipe with an open upper end provided in the upper circulation pipe 33 of the bath heat exchanger 2, and a float 34 is arranged inside this water level sensing pipe 32.

Reference numeral 35 denotes a pipe inserted downward into the upper part of the water level sensing pipe 32 with a gap 36 as an air port, and this pipe 35 is connected to the chamber 26 of the differential pressure device 23 via the pipe 28.
It is connected to

When the water level of the bathtub 24 reaches the set water level, the float 34 comes into contact with the pipe 35 at an appropriate position, and the gap 36 and the chamber 2 of the differential pressure device 23 are closed.
6 is formed.

This sealing portion 37 is positioned below the upper end of the water level sensing pipe 32.

The water level sensing pipe 32, the float 34, and the pipe 35 constitute a water level sensing device 38.

A cam 39 regulates the stroke of the pin 40 fixed to the main shaft 12.

41 is a spring that always urges the main shaft 12 upward.

42 is a time switch connected to the thermoelectric circuit.

Since the present invention is constructed as described above, its operation will be explained next. First, the time switch 42 is set to an appropriate time.

When the main shaft 12 is rotated 90 degrees to open the safety valve 6 and pilot valve 9, gas is supplied to the pilot burner 8, and when it is ignited by some means, pilot combustion is started.

Since the thermocouple 10 is heated by this pilot flame,
The electromagnet 11 is energized and attracts and holds the safety valve 6 in an open state.

Now, if you want to use it as a simple hot water supply (shower or hot water), simply rotate the main shaft 12 by another 90 degrees, the main valve 7 will open, gas will be supplied to the gas burner 4, and the pilot flame will ignite. As main combustion starts, the lever 18 is pressed by the cam 20 fixed to the main shaft 12, so the water stop valve 16 opens and water flows into the water passage 13.

This water is heated in the hot water supply heat exchanger 3 and supplied as hot water or a shower.

Here, this hot water may be used as it is for supplying hot water to the bathtub 24, but it is possible to forget to close the water stop valve 16, which is economically wasteful, and cannot be used with confidence.

Therefore, when supplying hot water to the bathtub 24, it is recommended to press the main shaft 12 once after the hot water supply process, and since the lock arm 21 also descends together with the cam 20, the roller 22 and the lever 18 are engaged, and the water stop valve 16 is opened. It is retained.

At this time, since hot water is flowing through the water passage 13, the chamber 26, which would normally be in communication with the venturi part 17 through the pipe 28, has a negative pressure, but the pressure is reduced through the pipe 35 and the gap 36. Since it is open to the atmosphere, the pressure is the same as that of the chamber 27, and the rod 31 is lowered by the spring 30.

Although hot water continues to be supplied to the bathtub 24, the chamber 26 is still open to the atmosphere as long as the water level in the bathtub 24 is below the set water level.

However, when the water level reaches the set level, the float 34 moves to the sealed part 37.
Since the rod contacts the gap 36 of the water level sensing device 38 and the chamber 26 of the differential pressure device 23, the pressure in the chamber 26 becomes lower than that in the chamber 27 due to the action of the venturi portion 17. 31 rises and lifts the lock arm 21, and the engagement between the roller 22 and the lever 18 is released.

As a result, the water stop valve 16 is closed, and hot water supply to the bathtub 24 is automatically stopped.

If the set time of the time switch 42 has not elapsed, the gas burner 4 continues to burn, and when the set time elapses, the thermoelectric circuit becomes an open circuit, so the electromagnet 11 is demagnetized and the safety valve 6 is closed. , the combustion of not only the gas burner 4 but also the pilot burner 8 is stopped.

After that, when reheating the hot water in the bathtub 24, restore the main shaft 12, ignite the pilot burner 8 again, and perform the next operation by pressing the main shaft 12 once and rotating it 90 degrees. good.

At this time, the cam 20 does not press the lever 18, so the water stop valve 16 remains closed, and only the main valve 7 is opened to start main combustion, making reheating possible.

Further, the water level in the bathtub 24 can be set appropriately by moving the pipe 35.

Although this example is applied to a circulating hot water supply bath pot, it is also possible to use a similar configuration to sterilize a simple water supply, and in this case, the process corresponds to the restraining process of this example. It is sufficient to operate the water stop valve alone during the operation process.

The present invention thus provides a lever that is pressed by a cam provided on the main shaft when the main shaft is rotated, a water stop valve that is opened against a spring when pressed by the lever, and a water stop valve that is vertically movable and that is opened by a cam provided on the main shaft. A lock arm that descends when the main shaft is depressed following the opening operation of the water valve, engages the lever, and restrains the lever in the suppressed open state of the water stop valve, and a pipe branched from a part of the venturi provided in the water passage. , a water level sensing pipe that communicates with the bathtub and has an open upper end, which is inserted downward into the water level sensing pipe with a gap, and at a set water level is blocked by a float placed inside the water level sensing pipe, cutting off communication with the gap. The pipe is divided into two chambers by a diaphragm, one chamber is open to the atmosphere, and the other chamber is equipped with a differential pressure device that communicates with the above two pipes.The differential pressure device has its upper end connected to a lock arm. Since we have installed a rondo that faces from below and responds to the diaphragm at the set water level and presses the rising lock arm to release the engagement with the lever, the water supply (hot water) to the bathtub automatically stops, which is extremely convenient. This eliminates the waste caused by forgetting to close the water shut-off valve, which was the case in the past, and it can be used with peace of mind.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is a diagram of the entire structure, Fig. 2 is a front view of the restraint device, Fig. 3 is a plan view of the same, and Fig. 4 is a diagram of regulating the stroke of the main shaft. FIG. FIG. 5 is a side view of the restraint device. 2... Heat exchanger, 13... Conduit, 1
6... Water stop valve, 17... Venturi part, 23... Differential pressure device, 24... Bathtub, 36... Air Mouth, 38... Water level sensing device, 43... Restraint device.

Claims (1)

[Claims] 1 A lever that is pressed by a cam provided on the main shaft when the main shaft is rotated, a water stop valve that is opened against a spring when pressed by this lever, and a water stop valve that is movable in the vertical direction and is used to open the water stop valve. A lock arm that descends upon subsequent pressing of the main shaft to engage the lever and restrain the lever in the state in which the water stop valve is pressed open; a pipe branching from a portion of the venturi provided in the water passage; and an upper end communicating with the bathtub. The water level sensing pipe has an open water level sensing pipe, and a sealed part is inserted downward into the water level sensing pipe with a gap and is closed by a float placed inside the water level sensing pipe at a set water level, cutting off communication with the gap. It is divided into two chambers by pipes and diaphragms, one chamber is open to the atmosphere, and the other chamber is equipped with a differential pressure device that communicates with the two pipes mentioned above.The differential pressure device has its upper end facing the lock arm from below to set the water level. An automatic kettle characterized by being provided with a rod that rises in response to a diaphragm and presses a lock arm to release its engagement with a lever.